BECKHOFF EL9xxx System Terminal Guide

EL9180 8 terminal points (internal paired connection) 1 (positive pole+negative pole+PE all lead out) Standard shell, each contact can be connected to ≤ 10 A

EL9181 16 terminal points (divided into two groups, with 8 internal connections in each group) 2 independent potential HD shells, direct plug-in technology

EL9182 16 terminal points (8 independent channels), each with one potential, suitable for multiple different signals

EL9183: Large scale distribution of all 16 terminal points connected to a single potential

EL9184 16 terminal points: 1-8 for+24   V, 9-16 for 0   V 2 (positive and negative) HD housing, dedicated to 24   V systems

EL9185 8 terminal points (1, 2, 5, 6 for+24   V; 3, 4, 7, 8 for 0   V) 2 standard housing with 4 additional connection points to power contacts

EL9185-0010 is the same as EL9185, but the power supply contact on the right side (forming a new potential group) 2 can interrupt the input of the left power supply contact and re feed

EL9186 8 terminal points (all connected to positive power contact) 1 positive output only

EL9187 8 terminal points (all connected to the negative power contact) 1 negative output only

EL9188 16 terminal points (all+24   V) 1 HD shell, 16 positive poles

EL9189 16 terminal points (all 0   V) 1 HD shell, 16 negative poles

HD (High Density) shell features: The width is still 12mm, but it provides 16 wiring points. Solid wires can be directly inserted (without tools), while thin stranded wires require a screwdriver to press the spring. Wire cross-section: solid 0.08... 1.5   mm ², stranded 0.25... 1.5   mm ², with tubular ends 0.14... 0.75   mm ².

Important limitation: The PE contact of EL9180 is coupled to the DIN rail through capacitance, so the PE feeder must be disconnected during insulation testing, otherwise it may cause misreading or damage to the terminal.

Shielded terminals: EL9070 and EL9195

4.1 EL9070

EL9070 provides 8 shielded wiring points, all of which are connected internally to the mounting rail. Its inner surface is a continuous copper layer, which can form good shielding isolation between the two EtherCAT terminals. Suitable for centralized grounding of multiple shielding layers, avoiding the use of additional grounding terminal blocks. The rated voltage is arbitrary (up to 230   V AC/DC), and the current load is 10   A. Note: EL9070 is not connected to the power contacts, only to the PE (through the guide rail). The working temperature range is 0... 55 ° C (non extended temperature).

4.2 EL9195

EL9195 is a high-voltage shielded terminal that also directly connects the spring contacts to the DIN rail, but simultaneously transmits two power contacts (positive and negative). Allow the power supply voltage to be transmitted to the right terminal while shielding the ground. It is suitable for 230V AC/DC systems. Internal wiring: Terminals 1 and 5 are connected, 2 and 6 are connected (positive pole), 3 and 7 are connected (0   V/N), and 4 and 8 are connected (shielded/PE). In the design of mixed voltage groups, EL9080 must be used for potential separation.

E-bus power input terminals: EL9400 and EL9410

The E-bus is provided by a coupler, with a maximum of 2 A (5 V). When the terminal station is too long or contains terminals with high current consumption (such as certain communication modules or high-precision analog terminals), the E-bus current may be insufficient. The E-bus current calculation in TwinCAT System Manager will display negative values and exclamation marks, and EL9400 or EL9410 must be inserted before the current depletion point.

EL9400: Pure power input, no diagnosis, requires external supply of 24V DC, outputs 2A to E-bus. At the same time, it also transmits power contacts (24V), which can be used to establish new potential groups.

EL9410: Added diagnostic function, indicating whether the E-bus voltage (Us) and power contact voltage (Up) are below 17V through LED and process mapping (2 bits: Us undervoltage, Up undervoltage). Its RUN LED also displays the EtherCAT state machine status (Initiat, PREOP, SAFEOP, OP, BOOTSTRAP).

Wiring: Terminals 1 and 5 of EL9410 provide power to the E-bus (+24   V and 0   V are used for internal DC/DC), while terminals 2/6 and 3/7 are used for the+24   V and 0   V loops in and out of the power contacts, respectively. Be sure to use the same ground potential, otherwise E-bus communication may be abnormal.

Surge filter terminal: EL9540/EL9550 series

In harsh electromagnetic environments such as ships, wind power, and offshore platforms, surge voltage may be generated on power lines due to lightning strikes or inductive load switching. The EL9540/EL9550 series terminals provide conducted surge protection.

Special Instructions for Diagnosis of Rated Current of Model Protection Object

EL9540 only provides on-site power supply (Up) of 10A without standard temperature range of 0... 55 ℃

EL9540-0010 is only available for on-site power supply of 5   A (under voltage/over-voltage diagnosis) and is particularly suitable for analog terminals, with a working temperature of -25...+60 ℃

EL9550 system power supply (Us)+on-site power supply (Up) Us ≤ 1.5 A (HW ≥ 03), Up ≤ 10 A, total not exceeding 10 A No old models